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A survey of 611 office workers found that 46% were able to take every phone call. The 90% confidence interval for the population proportion is [0.4267, 0.4931]. A sample of 30 containers on a production line had a mean weight of 510g. With a significance level of 0.05, the p-value is 0.0285 so the filling mechanism needs adjustment. A sample mean of 495g had a p-value of 0.2733 so there is no evidence the mechanism needs adjustment.

Author

Sergio

Language

EN